Valley Plaza Park North and South Stormwater Capture Project

Summary

Both North and South Valley Plaza Park Projects are designed for stormwater capture and infiltration. The sites are in North Hollywood and will include community benefits such as enhanced recreational areas, open space, and flood control. Descriptions of each projects are as follows:

North: The project scope features the installation of two subsurface infiltration galleries, utilizing approximately 4.6 acres of land area for stormwater capture and infiltration. The Project will divert stormwater from a 920-acre tributary area and has the potential to capture and infiltrate approximately 460 acre-ft per year. The project will receive flows from a nearby Los Angeles County Flood Control District underground storm drain.

South: The project scope features the installation of one subsurface infiltration galleries, utilizing approximately 1.6 acres of land area for stormwater capture and infiltration. The project will divert stormwater from a 213-acre tributary area and has the potential to capture and infiltrate approximately 136 acre-ft per year. The project will receive flows from a nearby Los Angeles County Flood Control District storm channel (Tujunga Wash Central Branch).

Environmental studies started in September 2019 and pre-design started in December2019. Design started in October 2020. The first community outreach meeting was held in August 2020.

Status: Design
Cost: $32,414,000 (North); $21,016,000 (South)
Funding: LADWP; Safe Clean Water Program (pending)
Agency Lead: City of Los Angeles
Footprint: 4.6 acres (North); 1.6 acres (South)
Drainage Area: 920 acres (North); 213 acres (South)
Volume Capture: 460 acre-feet/yr (North); 136 acre-feet/yr (South)
Implemented Control Measures: Underground infiltration gallery to infiltrate stormwater
Key Benefits: Increase local water supply, improve downstream water quality in receiving water bodies, increase capacity in flood control infrastructure, expand park infrastructure, job creation, environmental education